While I agree, just play whatever you want and stop gatekeeping, I do think there's a degree of bad design that often happens around difficulty sliders. Many games will have different difficulties that boil down to something like, "Easy: enemies have half health and do half damage", "Medium: 1x health and 1x damage", and "hard: 2x damage and 16x health"

Instead of a pretty well tailored, and maybe difficult challenge that can be overcome with skill or by using the game's mechanics, you just have a game that either doesn't challenge you or does, but every fight is going to be bullet/damage sponge hell.